BewitchmentZ
This compatibility addon to the LevelZ mod adds level locks for some of Bewitchment's weapons and armour.
Unsurprisingly, you will need both LevelZ and Bewitchment to use this datapack/mod.
Feel free to modify the datapack to your liking by tweaking unlock values.
Also check out Better Combat Bewitchment Compatibility to integrate the Bewitchment mod with Better Combat.
By default in order to wear the besmirched hood (or any bewitchment armor) you will need a certain amount of skill points in the 'Defense' skill
By default in order to deal damage with the Athame (or any bewitchment weapon) you will need a certain amount of skill points in the 'Alchemy' or 'Strength' skill.